Contents

Design

KISS. Try to use the least amount of components, and don't overcomplicate the configuration. For example, don't use maildrop if Dovecot already has an MDA/LDA.

MTA: Postfix

MDA/LDA: Dovecot LDA

MSS: Dovecot

MUA: Roundcube

lists: Mailman

storage format: Maildir

storage redundancy: Tahoe-LAFS

storage backup: duplicity to NFS share, duplicity to VTLUUG, etc.

Online storage

Use the traditional Maildir format for storing mail. Make the MDA/LDA store it under the Tahoe-LAFS $BASEDIR directory so it can be accessed from multiple different MSSs and MUAs.

Offline storage

Occasionally copy the Maildir directory out of the Tahoe-LAFS share since we don't actually trust Tahoe-LAFS. We respect people's privacy, so don't just rsync it out to a 3rd party. Easiest solution would be to use Duplicity to automatically perform encrypted, incremental backups to the 3rd party.

Transitional details

How to migrate emails from Google Groups to Maildir readable by Mailman?

How to migrate users of @linux.ucla.edu emails to the internal system (e.g. login access to POP3/IMAP/Roundcube)? Make use of LDAP?